The average life expectancy of tires produced by the Whitney Tire Company has been 40,000 miles. Management believes that due to a new production process, the life expectancy of their tires has increased. In order to test the validity of their belief, the correct set of hypotheses is
A. H0: ?< 40,000 Ha: ?
40,000.
B. H0: ?
40,000 Ha: ?> 40,000.
C. H0: ?> 40,000 Ha: ?
40,000.
D. H0: ?
40,000 Ha: ?< 40,000.
Answer: B
Business
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